12518991 has 12 divisors (see below), whose sum is σ = 18153720. Its totient is φ = 8313360.

The previous prime is 12518959. The next prime is 12519019. The reversal of 12518991 is 19981521.

It is not a de Polignac number, because 12518991 - 2⁵ = 12518959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12518921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165 + ... + 5006.

It is an arithmetic number, because the mean of its divisors is an integer number (1512810).

Almost surely, 2^12518991 is an apocalyptic number.

12518991 is a deficient number, since it is larger than the sum of its proper divisors (5634729).

12518991 is a wasteful number, since it uses less digits than its factorization.

12518991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5446 (or 5443 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 12518991 is about 3538.2186195881. The cubic root of 12518991 is about 232.1969134279.

The spelling of 12518991 in words is "twelve million, five hundred eighteen thousand, nine hundred ninety-one".